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Finding the Fourth Proportional to 42,806.70, 64,194.26 and 14,719.28

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Solution

The fourth proportional to 42,806.70, 64,194.26 and 14,719.28 is: 22,073.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,806.70 : 64,194.26 = 14,719.28 : x
  2. Step 2: Convert to fraction form
    42,806.70/64,194.26 = 14,719.28/x
  3. Step 3: Cross multiply
    42,806.70x = 64,194.26 × 14,719.28
  4. Step 4: Simplify right side
    42,806.70x = 944,892,892.77
  5. Step 5: Solve for x
    x = 944,892,892.77/42,806.70
  6. Step 6: Final answer
    x = 22,073.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.